EP 0349387 A1 19900103 - Indirectly heated X-ray tube with a flat cathode.
Title (en)
Indirectly heated X-ray tube with a flat cathode.
Title (de)
Röntgenröhre mit flacher Kathode und indirekter Heizung.
Title (fr)
Tube radiogène à cathode plane et à chauffage indirect.
Publication
Application
Priority
FR 8808962 A 19880701
Abstract (en)
The problems are resolved of temperature holding of cathodes by making hollow beam-shaped flat cathodes. This ensures them a rigidity inherent in the beam-shape without however endowing them with the disadvantages of too large a thermal inertia. <IMAGE>
Abstract (fr)
On résout les problèmes de tenue en température des cathodes en réalisant des cathodes planes en forme de poutre creuse. Ceci leur assure une rigidité inhérente à la forme en poutre, sans leur conférer par ailleurs les inconvénients d'une trop grande inertie thermique.
IPC 1-7
IPC 8 full level
H01J 35/06 (2006.01); H01J 35/14 (2006.01)
CPC (source: EP US)
H01J 35/06 (2013.01 - EP US); H01J 35/064 (2019.04 - EP US); H01J 35/066 (2019.04 - EP US); H01J 35/147 (2019.04 - EP US)
Citation (search report)
- [Y] DE 416533 C 19250717 - SIEMENS AG
- [A] US 3916202 A 19751028 - HEITING ROBERT F, et al
- [Y] PATENT ABSTRACTS OF JAPAN, vol. 2, no. 64 (E-78)[2148], 17 mai 1978, page 2148 E 78; & JP-A-53 30 292 (TOKYO SHIBAURA DENKI K.K.) 22-03-1978
- [A] PATENT ABSTRACTS OF JAPAN, vol. 4, no. 157 (E-32)[639], 4 novembre 1980, page 131 E 32; & JP-A-55 108 158 (HITACHI SEISAKUSHO K.K.) 19-08-1980
Designated contracting state (EPC)
DE ES GB IT NL
DOCDB simple family (publication)
EP 0349387 A1 19900103; EP 0349387 B1 19911127; DE 68900473 D1 19920109; ES 2027457 T3 19920601; FR 2633775 A1 19900105; FR 2633775 B1 19951117; JP 2840616 B2 19981224; JP H0254849 A 19900223; US 5044005 A 19910827
DOCDB simple family (application)
EP 89401761 A 19890622; DE 68900473 T 19890622; ES 89401761 T 19890622; FR 8808962 A 19880701; JP 16969489 A 19890630; US 37388689 A 19890630